+ 1 for loctite .
Just about finished the stuart score engine and used loctite on it and was easy to do .
I still pinned the crank webs to the crankshaft but didn't bother with the big ends , loctite by itself would be more than strong enough but i liked the added security of pins .
Just make sure everything is super clean before you put the loctite on , nice brite steel so a qiuck polish with some scotch brite and then i used acetone to clean everything up.
I have heard of people using liquid paper to mask areas that they don't want silver solder to flow to but i have never tried it so can't say it does,or doesn't work.